<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">Hello world</div>
    <script>
        window.addEventListener('DOMContentLoaded', () => {
            console.log('DOMContentLoaded')
        })
    </script>
    <script src="./modules/index.js" type="module" />
</body>
</html>